Bug 532774 - [GenericEditor] Tests for <enabledWhen> SupportI20180331-1500I20180330-2235I20180330-2000I20180329-2000I20180329-0000I20180328-2000I20180327-2000

 - Tests for turning on and off a property that in turn enables/disables
each extension point

Change-Id: Idd6805d6e6677a93e822657ab7182136636078a0
Signed-off-by: Lucas Bullen <lbullen@redhat.com>

9 files changed, 261 insertions, 16 deletions

diff --git a/org.eclipse.ui.genericeditor.tests/META-INF/MANIFEST.MF b/org.eclipse.ui.genericeditor.tests/META-INF/MANIFEST.MF
index b3738db2e2d..3d0e5ebbe9f 100644
--- a/org.eclipse.ui.genericeditor.tests/META-INF/MANIFEST.MF
+++ b/org.eclipse.ui.genericeditor.tests/META-INF/MANIFEST.MF
@@ -20,7 +20,8 @@ Require-Bundle: org.eclipse.core.runtime;bundle-version="[3.6.0,4.0.0)",
  org.eclipse.jface.text.tests;bundle-version="3.11.100",
  org.eclipse.text.tests;bundle-version="3.11.0",
  org.eclipse.ui.workbench.texteditor.tests;bundle-version="3.11.100",
- org.eclipse.ui.editors;bundle-version="3.11.0"
+ org.eclipse.ui.editors;bundle-version="3.11.0",
+ org.eclipse.core.expressions
 Bundle-RequiredExecutionEnvironment: JavaSE-1.8
 Eclipse-BundleShape: dir
 Bundle-ActivationPolicy: lazy
diff --git a/org.eclipse.ui.genericeditor.tests/plugin.xml b/org.eclipse.ui.genericeditor.tests/plugin.xml
index 1700b8ff825..1d81989bb2a 100644
--- a/org.eclipse.ui.genericeditor.tests/plugin.xml
+++ b/org.eclipse.ui.genericeditor.tests/plugin.xml
@@ -23,12 +23,32 @@
 			class="org.eclipse.ui.genericeditor.tests.contributions.LongRunningBarContentAssistProcessor"
 			contentType="org.eclipse.ui.genericeditor.tests.specialized-content-type">
 		</contentAssistProcessor>
+		<contentAssistProcessor
+	        class="org.eclipse.ui.genericeditor.tests.contributions.BarContentAssistProcessor"
+	        contentType="org.eclipse.ui.genericeditor.tests.enabled-when-content-type">
+	      <enabledWhen>
+	        <test
+	            forcePluginActivation="true"
+	            property="org.eclipse.ui.genericeditor.tests.contributions.enabled">
+	        </test>
+	      </enabledWhen>
+		</contentAssistProcessor>
 	</extension>
 	<extension
 			point="org.eclipse.ui.genericeditor.hoverProviders">
 		<hoverProvider
-			class="org.eclipse.ui.genericeditor.tests.contributions.AlrightyHoverProvider"
-			contentType="org.eclipse.ui.genericeditor.tests.content-type">
+        class="org.eclipse.ui.genericeditor.tests.contributions.AlrightyHoverProvider"
+        contentType="org.eclipse.ui.genericeditor.tests.enabled-when-content-type">
+     		<enabledWhen>
+        		<test
+              			forcePluginActivation="true"
+              			property="org.eclipse.ui.genericeditor.tests.contributions.enabled">
+        		</test>
+			</enabledWhen>
+		</hoverProvider>
+		<hoverProvider
+        		class="org.eclipse.ui.genericeditor.tests.contributions.AlrightyHoverProvider"
+       			contentType="org.eclipse.ui.genericeditor.tests.content-type">
 		</hoverProvider>
 		<hoverProvider
 			class="org.eclipse.ui.genericeditor.tests.contributions.WorldHoverProvider"
@@ -38,6 +58,18 @@
 			class="org.eclipse.ui.genericeditor.tests.contributions.HelloHoverProvider"
 			contentType="org.eclipse.ui.genericeditor.tests.specialized-content-type-bar">
 		</hoverProvider>
+		<hoverProvider
+        		class="org.eclipse.ui.genericeditor.tests.contributions.WorldHoverProvider"
+				contentType="org.eclipse.ui.genericeditor.tests.enabled-when-content-type">
+     		<enabledWhen>
+        		<not>
+           			<test
+                 			forcePluginActivation="true"
+                 			property="org.eclipse.ui.genericeditor.tests.contributions.enabled">
+           			</test>
+        		</not>
+			</enabledWhen>
+  		</hoverProvider>
 	</extension>
 	<extension
 			point="org.eclipse.ui.genericeditor.reconcilers">
@@ -53,6 +85,28 @@
 			class="org.eclipse.ui.genericeditor.tests.contributions.TheReconcilerFirst"
 			contentType="org.eclipse.ui.genericeditor.tests.content-type">
 		</reconciler>
+  		<reconciler
+        		class="org.eclipse.ui.genericeditor.tests.contributions.TheReconcilerFirst"
+        		contentType="org.eclipse.ui.genericeditor.tests.enabled-when-content-type">
+     		<enabledWhen>
+        		<test
+              			forcePluginActivation="true"
+              			property="org.eclipse.ui.genericeditor.tests.contributions.enabled">
+        		</test>
+     		</enabledWhen>
+  		</reconciler>
+  		<reconciler
+        		class="org.eclipse.ui.genericeditor.tests.contributions.TheReconcilerSecond"
+       			contentType="org.eclipse.ui.genericeditor.tests.enabled-when-content-type">
+     		<enabledWhen>
+        		<not>
+           			<test
+                 			forcePluginActivation="true"
+                 			property="org.eclipse.ui.genericeditor.tests.contributions.enabled">
+           			</test>
+        		</not>
+     		</enabledWhen>
+  		</reconciler>
 	</extension>
 	<extension
 			point="org.eclipse.ui.genericeditor.presentationReconcilers">
@@ -68,6 +122,16 @@
 			class="org.eclipse.ui.genericeditor.tests.contributions.ThePresentationReconcilerRed"
 			contentType="org.eclipse.ui.genericeditor.tests.sub-specialized-content-type">
 		</presentationReconciler>
+  		<presentationReconciler
+        		class="org.eclipse.ui.genericeditor.tests.contributions.ThePresentationReconcilerBlue"
+        		contentType="org.eclipse.ui.genericeditor.tests.enabled-when-content-type">
+     		<enabledWhen>
+        		<test
+              			forcePluginActivation="true"
+              			property="org.eclipse.ui.genericeditor.tests.contributions.enabled">
+        		</test>
+     		</enabledWhen>
+  		</presentationReconciler>
 	</extension>
 	<extension
 			point="org.eclipse.ui.ide.markerResolution">
@@ -120,6 +184,13 @@
 			name="Specialized Generic Editor content-type for &apos;bar.txt&apos;"
 			priority="normal">
 		</content-type>
+		<content-type
+			base-type="org.eclipse.core.runtime.text"
+			file-names="enabledWhen.txt"
+			id="org.eclipse.ui.genericeditor.tests.enabled-when-content-type"
+			name="enabledWhen content-type for &apos;enabledWhen.txt&apos;"
+			priority="normal">
+		</content-type>
 	</extension>
 	<extension
 			point="org.eclipse.ui.genericeditor.autoEditStrategies">
@@ -135,6 +206,16 @@
 			class="org.eclipse.ui.genericeditor.tests.contributions.TheAutoEditStrategyThird"
 			contentType="org.eclipse.ui.genericeditor.tests.sub-specialized-content-type">
 		</autoEditStrategy>
+		<autoEditStrategy
+			class="org.eclipse.ui.genericeditor.tests.contributions.TheAutoEditStrategyFirst"
+			contentType="org.eclipse.ui.genericeditor.tests.enabled-when-content-type">
+     		<enabledWhen>
+        		<test
+              			forcePluginActivation="true"
+             			property="org.eclipse.ui.genericeditor.tests.contributions.enabled">
+        		</test>
+     		</enabledWhen>
+		</autoEditStrategy>
 	</extension>
 	<extension
 			point="org.eclipse.ui.genericeditor.highlightReconcilers">
@@ -142,5 +223,25 @@
 			class="org.eclipse.ui.genericeditor.tests.contributions.HighlightReconciler"
 			contentType="org.eclipse.ui.genericeditor.tests.content-type-bar">
 		</highlightReconciler>
- </extension>
+		<highlightReconciler
+				class="org.eclipse.ui.genericeditor.tests.contributions.HighlightReconciler"
+				contentType="org.eclipse.ui.genericeditor.tests.enabled-when-content-type">
+			<enabledWhen>
+				<test
+						forcePluginActivation="true"
+						property="org.eclipse.ui.genericeditor.tests.contributions.enabled">
+				</test>
+			</enabledWhen>
+		</highlightReconciler>
+	</extension>
+	<extension
+			point="org.eclipse.core.expressions.propertyTesters">
+    	<propertyTester
+				class="org.eclipse.ui.genericeditor.tests.contributions.EnabledPropertyTester"
+				id="org.eclipse.ui.genericeditor.tests.contributions.enabled"
+				namespace="org.eclipse.ui.genericeditor.tests.contributions"
+				properties="enabled"
+				type="org.eclipse.ui.internal.genericeditor.ExtensionBasedTextEditor">
+    	</propertyTester>
+	</extension>
 </plugin>
diff --git a/org.eclipse.ui.genericeditor.tests/src/org/eclipse/ui/genericeditor/tests/AutoEditTest.java b/org.eclipse.ui.genericeditor.tests/src/org/eclipse/ui/genericeditor/tests/AutoEditTest.java
index 1aa3a3e5146..caddf69c887 100644
--- a/org.eclipse.ui.genericeditor.tests/src/org/eclipse/ui/genericeditor/tests/AutoEditTest.java
+++ b/org.eclipse.ui.genericeditor.tests/src/org/eclipse/ui/genericeditor/tests/AutoEditTest.java
@@ -18,6 +18,8 @@ import org.eclipse.swt.widgets.Control;
 
 import org.eclipse.jface.text.IDocument;
 
+import org.eclipse.ui.genericeditor.tests.contributions.EnabledPropertyTester;
+
 public class AutoEditTest extends AbstratGenericEditorTest {
 
 	@Test
@@ -29,4 +31,23 @@ public class AutoEditTest extends AbstratGenericEditorTest {
 		Assert.assertEquals("AutoAddedThird!AutoAddedSecond!AutoAddedFirst!", document.get());
 	}
 
+	@Test
+	public void testEnabledWhenAutoEdit() throws Exception {
+		EnabledPropertyTester.setEnabled(true);
+		createAndOpenFile("enabledWhen.txt", "bar 'bar'");
+		IDocument document= editor.getDocumentProvider().getDocument(editor.getEditorInput());
+		StyledText control= (StyledText) editor.getAdapter(Control.class);
+		control.setText("");
+		// order of auto-edits from most specialized to least specialized
+		Assert.assertEquals("AutoAddedFirst!", document.get());
+		cleanFileAndEditor();
+
+		EnabledPropertyTester.setEnabled(false);
+		createAndOpenFile("enabledWhen.txt", "bar 'bar'");
+		document= editor.getDocumentProvider().getDocument(editor.getEditorInput());
+		control= (StyledText) editor.getAdapter(Control.class);
+		control.setText("");
+		// order of auto-edits from most specialized to least specialized
+		Assert.assertEquals("", document.get());
+	}
 }
diff --git a/org.eclipse.ui.genericeditor.tests/src/org/eclipse/ui/genericeditor/tests/CompletionTest.java b/org.eclipse.ui.genericeditor.tests/src/org/eclipse/ui/genericeditor/tests/CompletionTest.java
index 31b0543957f..91ec93ff095 100644
--- a/org.eclipse.ui.genericeditor.tests/src/org/eclipse/ui/genericeditor/tests/CompletionTest.java
+++ b/org.eclipse.ui.genericeditor.tests/src/org/eclipse/ui/genericeditor/tests/CompletionTest.java
@@ -11,6 +11,7 @@
 package org.eclipse.ui.genericeditor.tests;
 
 import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotNull;
 import static org.junit.Assert.assertTrue;
 
 import java.util.Arrays;
@@ -36,6 +37,7 @@ import org.eclipse.jface.text.contentassist.ICompletionProposal;
 import org.eclipse.jface.text.tests.util.DisplayHelper;
 
 import org.eclipse.ui.genericeditor.tests.contributions.BarContentAssistProcessor;
+import org.eclipse.ui.genericeditor.tests.contributions.EnabledPropertyTester;
 import org.eclipse.ui.genericeditor.tests.contributions.LongRunningBarContentAssistProcessor;
 
 import org.eclipse.ui.texteditor.ContentAssistAction;
@@ -51,11 +53,7 @@ public class CompletionTest extends AbstratGenericEditorTest {
 	@Test
 	public void testCompletion() throws Exception {
 		final Set<Shell> beforeShells = Arrays.stream(editor.getSite().getShell().getDisplay().getShells()).filter(Shell::isVisible).collect(Collectors.toSet());
-		editor.selectAndReveal(3, 0);
-		ContentAssistAction action = (ContentAssistAction) editor.getAction(ITextEditorActionConstants.CONTENT_ASSIST);
-		action.update();
-		action.run();
-		waitAndDispatch(100);
+		openConentAssist();
 		this.completionShell= findNewShell(beforeShells);
 		final Table completionProposalList = findCompletionSelectionControl(completionShell);
 		checkCompletionContent(completionProposalList);
@@ -63,6 +61,36 @@ public class CompletionTest extends AbstratGenericEditorTest {
 		// Assert.assertEquals("Completion didn't complete", "bars are good for a beer.", ((StyledText)editor.getAdapter(Control.class)).getText());
 	}
 
+	@Test
+	public void testEnabledWhenCompletion() throws Exception {
+		// Confirm that when disabled, a completion shell is present
+		EnabledPropertyTester.setEnabled(false);
+		createAndOpenFile("enabledWhen.txt", "bar 'bar'");
+		final Set<Shell> beforeShells = Arrays.stream(editor.getSite().getShell().getDisplay().getShells()).filter(Shell::isVisible).collect(Collectors.toSet());
+		openConentAssist();
+		Shell[] afterShells = Arrays.stream(editor.getSite().getShell().getDisplay().getShells())
+				.filter(Shell::isVisible)
+				.filter(shell -> !beforeShells.contains(shell))
+				.toArray(Shell[]::new);
+		assertEquals("A new shell was found", 0, afterShells.length);
+		cleanFileAndEditor();
+
+		// Confirm that when enabled, a completion shell is present
+		EnabledPropertyTester.setEnabled(true);
+		createAndOpenFile("enabledWhen.txt", "bar 'bar'");
+		final Set<Shell> beforeEnabledShells = Arrays.stream(editor.getSite().getShell().getDisplay().getShells()).filter(Shell::isVisible).collect(Collectors.toSet());
+		openConentAssist();
+		assertNotNull(findNewShell(beforeEnabledShells));
+	}
+
+	private void openConentAssist() {
+		editor.selectAndReveal(3, 0);
+		ContentAssistAction action = (ContentAssistAction) editor.getAction(ITextEditorActionConstants.CONTENT_ASSIST);
+		action.update();
+		action.run();
+		waitAndDispatch(100);
+	}
+
 	/**
 	 * Checks that completion behaves as expected:
 	 * 1. Computing is shown instantaneously
@@ -111,11 +139,7 @@ public class CompletionTest extends AbstratGenericEditorTest {
 	@Test
 	public void testCompletionFreeze_bug521484() throws Exception {
 		final Set<Shell> beforeShells = Arrays.stream(editor.getSite().getShell().getDisplay().getShells()).filter(Shell::isVisible).collect(Collectors.toSet());
-		editor.selectAndReveal(3, 0);
-		ContentAssistAction action = (ContentAssistAction) editor.getAction(ITextEditorActionConstants.CONTENT_ASSIST);
-		action.update();
-		action.run();
-		waitAndDispatch(100);
+		openConentAssist();
 		this.completionShell= findNewShell(beforeShells);
 		final Table completionProposalList = findCompletionSelectionControl(this.completionShell);
 		// should be instantaneous, but happens to go asynchronous on CI so let's allow a wait
@@ -134,7 +158,7 @@ public class CompletionTest extends AbstratGenericEditorTest {
 		emulatePressLeftArrowKey();
 		DisplayHelper.sleep(editor.getSite().getShell().getDisplay(), 200); //give time to process events
 		long processingDuration = System.currentTimeMillis() - timestamp;
-		assertTrue("UI Thread frozen for " + processingDuration + "ms", processingDuration < LongRunningBarContentAssistProcessor.DELAY);		
+		assertTrue("UI Thread frozen for " + processingDuration + "ms", processingDuration < LongRunningBarContentAssistProcessor.DELAY);
 	}
 
 	@Test
diff --git a/org.eclipse.ui.genericeditor.tests/src/org/eclipse/ui/genericeditor/tests/HighlightTest.java b/org.eclipse.ui.genericeditor.tests/src/org/eclipse/ui/genericeditor/tests/HighlightTest.java
index 802640626a8..b80950c8b25 100644
--- a/org.eclipse.ui.genericeditor.tests/src/org/eclipse/ui/genericeditor/tests/HighlightTest.java
+++ b/org.eclipse.ui.genericeditor.tests/src/org/eclipse/ui/genericeditor/tests/HighlightTest.java
@@ -27,6 +27,8 @@ import org.eclipse.jface.text.source.Annotation;
 import org.eclipse.jface.text.source.IAnnotationModel;
 import org.eclipse.jface.text.tests.util.DisplayHelper;
 
+import org.eclipse.ui.genericeditor.tests.contributions.EnabledPropertyTester;
+
 import org.eclipse.ui.texteditor.IDocumentProvider;
 
 public class HighlightTest extends AbstratGenericEditorTest {
@@ -50,6 +52,18 @@ public class HighlightTest extends AbstratGenericEditorTest {
 	}
 
 	@Test
+	public void testEnabledWhenCustomHighlightReconciler() throws Exception {
+		EnabledPropertyTester.setEnabled(true);
+		createAndOpenFile("enabledWhen.txt", "bar 'bar'");
+		checkHighlightForCaretOffset(0, "'bar'", 1);
+		cleanFileAndEditor();
+
+		EnabledPropertyTester.setEnabled(false);
+		createAndOpenFile("enabledWhen.txt", "bar 'bar'");
+		checkHighlightForCaretOffset(0, "'bar'", 0);
+	}
+
+	@Test
 	public void testHighlightWordAtDocumentStart() throws Exception {
 		createAndOpenFile("foo.txt", EDITOR_TEXT);
 
diff --git a/org.eclipse.ui.genericeditor.tests/src/org/eclipse/ui/genericeditor/tests/HoverTest.java b/org.eclipse.ui.genericeditor.tests/src/org/eclipse/ui/genericeditor/tests/HoverTest.java
index 68a1f18ccb4..3f08862ab90 100644
--- a/org.eclipse.ui.genericeditor.tests/src/org/eclipse/ui/genericeditor/tests/HoverTest.java
+++ b/org.eclipse.ui.genericeditor.tests/src/org/eclipse/ui/genericeditor/tests/HoverTest.java
@@ -48,6 +48,7 @@ import org.eclipse.jface.text.TextViewer;
 import org.eclipse.jface.text.tests.util.DisplayHelper;
 
 import org.eclipse.ui.genericeditor.tests.contributions.AlrightyHoverProvider;
+import org.eclipse.ui.genericeditor.tests.contributions.EnabledPropertyTester;
 import org.eclipse.ui.genericeditor.tests.contributions.HelloHoverProvider;
 import org.eclipse.ui.genericeditor.tests.contributions.MarkerResolutionGenerator;
 import org.eclipse.ui.genericeditor.tests.contributions.WorldHoverProvider;
@@ -77,6 +78,22 @@ public class HoverTest extends AbstratGenericEditorTest {
 		assertNull(findControl(shell, StyledText.class, WorldHoverProvider.LABEL));
 	}
 
+	@Test
+	public void testEnabledWhenHover() throws Exception {
+		EnabledPropertyTester.setEnabled(true);
+		createAndOpenFile("enabledWhen.txt", "bar 'bar'");
+		Shell shell = getHoverShell(triggerCompletionAndRetrieveInformationControlManager());
+		assertNotNull(findControl(shell, StyledText.class, AlrightyHoverProvider.LABEL));
+		assertNull(findControl(shell, StyledText.class, WorldHoverProvider.LABEL));
+		cleanFileAndEditor();
+
+		EnabledPropertyTester.setEnabled(false);
+		createAndOpenFile("enabledWhen.txt", "bar 'bar'");
+		shell = getHoverShell(triggerCompletionAndRetrieveInformationControlManager());
+		assertNull(findControl(shell, StyledText.class, AlrightyHoverProvider.LABEL));
+		assertNotNull(findControl(shell, StyledText.class, WorldHoverProvider.LABEL));
+	}
+
 	/**
 	 * @throws Exception ex
 	 * @since 1.1
diff --git a/org.eclipse.ui.genericeditor.tests/src/org/eclipse/ui/genericeditor/tests/ReconcilerTest.java b/org.eclipse.ui.genericeditor.tests/src/org/eclipse/ui/genericeditor/tests/ReconcilerTest.java
index 0f5470814a3..f84a427156a 100644
--- a/org.eclipse.ui.genericeditor.tests/src/org/eclipse/ui/genericeditor/tests/ReconcilerTest.java
+++ b/org.eclipse.ui.genericeditor.tests/src/org/eclipse/ui/genericeditor/tests/ReconcilerTest.java
@@ -28,6 +28,7 @@ import org.eclipse.jface.text.IDocument;
 import org.eclipse.jface.text.tests.util.DisplayHelper;
 
 import org.eclipse.ui.PlatformUI;
+import org.eclipse.ui.genericeditor.tests.contributions.EnabledPropertyTester;
 import org.eclipse.ui.genericeditor.tests.contributions.ReconcilerStrategyFirst;
 import org.eclipse.ui.genericeditor.tests.contributions.ReconcilerStrategySecond;
 import org.eclipse.ui.internal.genericeditor.ExtensionBasedTextEditor;
@@ -47,6 +48,18 @@ public class ReconcilerTest extends AbstratGenericEditorTest {
 	}
 
 	@Test
+	public void testEnabledWhenReconciler() throws Exception {
+		EnabledPropertyTester.setEnabled(true);
+		createAndOpenFile("enabledWhen.txt", "");
+		performTestOnEditor(ReconcilerStrategyFirst.SEARCH_TERM, editor, ReconcilerStrategyFirst.REPLACEMENT);
+		cleanFileAndEditor();
+
+		EnabledPropertyTester.setEnabled(false);
+		createAndOpenFile("enabledWhen.txt", "");
+		performTestOnEditor(ReconcilerStrategySecond.SEARCH_TERM, editor, ReconcilerStrategySecond.REPLACEMENT);
+	}
+
+	@Test
 	public void testMultipleEditors() throws Exception {
 		secondProject= ResourcesPlugin.getWorkspace().getRoot().getProject(getClass().getName() + System.currentTimeMillis());
 		secondProject.create(null);
@@ -57,7 +70,7 @@ public class ReconcilerTest extends AbstratGenericEditorTest {
 				.getActivePage().openEditor(new FileEditorInput(secondFile), "org.eclipse.ui.genericeditor.GenericEditor");
 		performTestOnEditor(ReconcilerStrategyFirst.SEARCH_TERM, editor, ReconcilerStrategyFirst.REPLACEMENT);
 	}
-	
+
 	@Test
 	public void testMultipleReconcilers() throws Exception {
 		secondFile = project.getFile("bar.txt");
diff --git a/org.eclipse.ui.genericeditor.tests/src/org/eclipse/ui/genericeditor/tests/StylingTest.java b/org.eclipse.ui.genericeditor.tests/src/org/eclipse/ui/genericeditor/tests/StylingTest.java
index 04d1e02dc20..cb664bceb36 100644
--- a/org.eclipse.ui.genericeditor.tests/src/org/eclipse/ui/genericeditor/tests/StylingTest.java
+++ b/org.eclipse.ui.genericeditor.tests/src/org/eclipse/ui/genericeditor/tests/StylingTest.java
@@ -10,6 +10,8 @@
  *******************************************************************************/
 package org.eclipse.ui.genericeditor.tests;
 
+import static org.junit.Assert.assertNull;
+
 import org.junit.Assert;
 import org.junit.Test;
 
@@ -18,6 +20,8 @@ import org.eclipse.swt.custom.StyledText;
 import org.eclipse.swt.graphics.RGB;
 import org.eclipse.swt.widgets.Control;
 
+import org.eclipse.ui.genericeditor.tests.contributions.EnabledPropertyTester;
+
 public class StylingTest extends AbstratGenericEditorTest {
 
 	@Test
@@ -29,4 +33,22 @@ public class StylingTest extends AbstratGenericEditorTest {
 		Assert.assertTrue("Token is not of expected color", isRed);
 	}
 
+	@Test
+	public void testEnabledWhenStyle() throws Exception {
+		EnabledPropertyTester.setEnabled(true);
+		createAndOpenFile("enabledWhen.txt", "bar 'bar'");
+		editor.selectAndReveal(4, 8);
+		StyledText widget = (StyledText) editor.getAdapter(Control.class);
+		StyleRange style= widget.getStyleRangeAtOffset(4);//get the style of first token
+		boolean isBlue= style.foreground.getRGB().equals(new RGB(0, 0, 255));//is it Blue?
+		Assert.assertTrue("Token is not of expected color", isBlue);
+		cleanFileAndEditor();
+
+		EnabledPropertyTester.setEnabled(false);
+		createAndOpenFile("enabledWhen.txt", "bar 'bar'");
+		editor.selectAndReveal(4, 8);
+		widget = (StyledText) editor.getAdapter(Control.class);
+		assertNull(widget.getStyleRangeAtOffset(4));
+	}
+
 }
diff --git a/org.eclipse.ui.genericeditor.tests/src/org/eclipse/ui/genericeditor/tests/contributions/EnabledPropertyTester.java b/org.eclipse.ui.genericeditor.tests/src/org/eclipse/ui/genericeditor/tests/contributions/EnabledPropertyTester.java
new file mode 100644
index 00000000000..65ba1ca1f52
--- /dev/null
+++ b/org.eclipse.ui.genericeditor.tests/src/org/eclipse/ui/genericeditor/tests/contributions/EnabledPropertyTester.java
@@ -0,0 +1,32 @@
+/*******************************************************************************
+ * Copyright (c) 2018 Red Hat Inc. and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ * - Lucas Bullen (Red Hat Inc.)
+ *******************************************************************************/
+package org.eclipse.ui.genericeditor.tests.contributions;
+
+import org.eclipse.core.expressions.PropertyTester;
+
+public class EnabledPropertyTester extends PropertyTester {
+
+	private static final String PROPERTY_NAME = "enabled";
+	private static boolean isEnabled = true;
+
+	@Override
+	public boolean test(Object receiver, String property, Object[] args, Object expectedValue) {
+		if (property.equals(PROPERTY_NAME)) {
+			return isEnabled;
+		}
+		return false;
+	}
+
+	public static void setEnabled(boolean isEnabled) {
+		EnabledPropertyTester.isEnabled = isEnabled;
+	}
+
+}